'I didn't think it was serious': Porto manager Sergio Conceicao reveals training continued for 15 MINUTES after Iker Casillas' heart attack as he thought it was not a big problem Porto boss Sergio Conceicao thought Iker Casillas' heart attack wasn't serious The 37-year-old suffered the medical emergency on Wednesday morning Conceicao revealed that Porto players kept training for 15 minutes afterwards The Spanish keeper is now recovering but he is expected to retire from football By Max Winters For Mailonline Published: 16:58 BST, 3 May 2019 | Updated: 16:58 BST, 3 May 2019 Viewcomments Porto manager Sergio Conceicao has revealed he didn't think the heat attack suffered by legendary Spanish goalkeeper Iker Casillas earlier this week was serious at first. The 37-year-old suffered the medical emergency on Wednesday morning and was rushed to hospital, where he is now in a stable condition. Despite the immediate concern over Casillas' health, Conceicao said during his pre-match press conference on Friday that the extent of his condition was not obvious at first. Porto's Sergio Conceicao did not think the heart attack suffered by Iker Casillas was serious The 37-year-old suffered the medical emergency on Wednesday and was rushed to hospital He said: 'I must confess I didn't think it was something serious at first,' said Conceicao. 'We were training and Iker was doing another type of exercise, so we kept training for another 15 or 20 minutes. 'But when the doctor told me what had happened around 30 minutes later we were immediately apprehensive.' It was revealed on Thursday that Porto are expecting Casillas to retire from football following the scare. Casillas' agent, Carlos Cutropia, told Spanish radio that they have not discussed his future, but Porto are reportedly ready for their No 1 - who has another year left on his contract - to end his playing career. According to Marca, Porto are focusing on making sure Casillas can live a normal life after such a serious incident, rather than on returning to top level sport. Despite his deal running until 2020, there is a strong chance that Wednesday's events will bring to a close what has been one of modern football's most stellar careers. Porto are focusing on making sure Casillas can live a normal life with his wife Sara Carbonero The former Real Madrid goalkeeper captained Spain to their only ever World Cup in 2010 Casillas captained Spain to glory at the 2010 World Cup, conceding just twice in seven matches and keeping a clean sheet in all four knock out games. He also won the European Championships in 2008 and 2012, and was capped 167 times by Spain - a national record. At club level, he won five La Liga titles and three Champions Leagues with Real Madrid, having made his debut for the Spanish giants aged 17. Casillas was associated with Real for 25 years, coming through their academy before a stint in the first team lasting between 1999 and 2015. He joined Porto after leaving the Bernabeu and was playing at the highest level right up until Wednesday's heart attack - he started both legs of the Champions League quarter final defeat to Liverpool. Share or comment on this article: All rights reserved for this news site dailymail and under his responsibility